Should I wait until August 20th to take Accuplacer test?

I won't be in atlanta till the 19th, and I want to be placed in calculus 1. Do you guys think it would cost any problems taking my exam so close to when classes start? I worry that GSU might work too slow and that i won't be able to adjust. What are your guy's suggestions? Do I have enough time?

I took the iCollege test and didn't score high enough. I do think I can do 100 times better with Accuplacer.